all lights flashing on HP LaserJet 2504dw printer

[Ollie19561]

WHEN TRYING TO INSTALL HP LASERJET TANK 250DW PRINTER VIA HP SMART TO A WINDOWS 11 HP DESKTOP PRINTER I AM GETTING ERROR MESSAGE UU_400_EB000U0707.  WHAT DOES THIS ERROR MEAN AND CAN I GET INFORMATION TO CORRECT THE PROBLEM?

[Sneha_01]

HI @Ollie19561,

Welcome to HP Support Community.

Thank you for posting your query, I will be glad to help you.

When all lights are flashing on an HP LaserJet 2504dw printer, it usually indicates a critical error or malfunction. Here's how you can troubleshoot this issue:

1. Power Cycle the Printer

• Turn off the printer and unplug it from the power source.
• Wait for about 1-2 minutes, then plug the printer back in and turn it on.
• Allow the printer to boot up completely and check if the lights are still flashing.

2. Check for Paper Jams

• Open the printer's covers and check for any paper jams or obstructions.
• Remove any stuck paper carefully to clear the paper path.

3. Inspect Toner Cartridges

• Make sure that all toner cartridges are properly installed and seated in their respective slots.
• If any cartridges are low or empty, replace them with new ones.

4. Check for Hardware Issues

• Inspect the printer for any visible damage or loose parts.
• Ensure that all covers and trays are securely closed.

5. Update Printer Firmware

• Check if there are any firmware updates available for your HP LaserJet 2504dw printer.
• Visit the HP Support website and download/install any available updates following the provided instructions.

6. Reset Printer to Factory Defaults

• Reset the printer to its factory default settings to clear any configuration errors.
• Refer to the printer's manual or HP's support website for instructions on how to perform a factory reset.

I hope this helps.

Take care and have a good day.

Please mark this post as “Accepted Solution” if the issue is resolved and if you feel this reply was helpful click “Yes”.

Rachel571

HP Support